A fallacy is an assertion that is stated
sloppily, or with the intent to sell an idea deceptively. Some writers resort to fallacies when the writer - out of laziness or an arrogant bias - has not
researched the idea well enough. It is important that citizens understand them so they will learn to recognize
faulty or deceptive reasoning.
Argument is often complex, and it occurs in
many different contexts, some contexts more tolerant than others. Debaters and persuaders and their audiences need to be able to identify
fallacies, but we should be cautious in jumping to conclusions about
them. Rather than thinking of them as errors, we can find and use them to
discredit, or to rebut. We might think of them as barriers to common
ground and understanding since they so often shut down rather than encourage productive debate.
Some of the more prevalent
fallacies:
- Either/Or
fallacy: This fallacy occurs when a
speaker or writer presents the audience with two false choices: "Either
this or that." Not everything in the world is right or wrong,
black or white, good or evil, democratic or undemocratic,
and so on. There are, of course, several issues and ideas that do
involve precisely two realities--one is either pregnant or one is not. But
other times an either/or statement fails to account for all possibilities in a
given situation. Those who commit this fallacy fail to account for the
complexity of an idea, sometimes purposely, in order to force adherence to an
agenda.
- Faulty
(or hasty) generalization: An arguer engages in a faulty generalization when the scope of the evidence is too small, or when evidence is too poor to support the conclusion. Example: Joe travels from London through the U.S. In his only
trip by car through St. Louis, Joe witnesses the aftermath of the worst car
wreck - involving several vehicles and injuries - he's seen in his life. If, upon arriving home, Joe concludes that St. Louis is the most dangerous city
in the U.S. in which to drive, he has committed a hasty generalization.
To actually justify such a claim, Joe would probably need to consult reliable recent data on automobile accident rates in U.S. metropolitan areas.
- After
this, therefore because of this: This
fallacy assumes or asserts that a time relationship is the same as a cause-effect, that the fact that something occurs first means that results in another thing. One of the most common instances of this fallacy occurs when one complains that a
rainstorm occurs because one has just washed one's car. Similarly,
the claim that a sharp sales increase in a brand of computers is due to the
buying public's fondness for a company spokesperson on TV may well be an
instance of this post hoc, ergo propter hoc fallacy. Some amount of credible
research would be required to determine the veracity of such a claim.
- Begging
the question: This occurs when one
makes assumptions about an argument’s truthfulness, or when a claim carries an
idea that is itself questionable. For example, the question-assertion,
"What has led to the current breakdown in the morals of contemporary
society?" This begs two questions: 1.
"In what ways, by what standards, have morals 'broken down' in
society?" 2. "How do you know; how can you measure and confirm
this?" Some assertions ("Reading and writing improve one's mind.")
are self-evident. But others ("Schools are more violent now than ever
before.") are not, and they must be proven.
- Argument
ad hominem: This phrase means
"to the man" and is one of the most common fallacies in public today.
To commit an ad hominem fallacy (or attack) is to criticize someone not on the
substance of what he or she says but on the personality of the person who says
it. To attack someone ad hominem is to attack that
person's character. Of course, character can have relevance to an
argument, but when such an attack is used to cloud the issue and distract from
rational discourse or other evidence, one commits an ad hominem fallacy. When actors
and musicians are criticized for having opinions about social or political
issues ("He doesn't know what he's talking about. After all, he's a
singer, not political analyst"), it won't do to simply dismiss their
remarks because they are "mere entertainers." Talk radio and
tabloid-style media largely thrive on ad hominem attacks. Careful
thinkers spot and denounce such tactics as invalid and, in some cases,
reprehensible.
- Argument
ad populum: Meaning "to the
people," this fallacy (similar to the ad hominem attack) occurs when one
appeals to peoples' irrational fears and prejudices as a way of preventing them
from directly facing issues. So, if someone from China says to
another Chinese, "That speaker is full of nonsense. He is
Japanese, after all," he is relying on an attitude, a shared suspicion of a certain group of people. Another way of committing an ad populum
fallacy is by employing connotative terms to stir the
emotions of a certain group of people. Words such as
"patriotic" and "pro-family" stir emotions for some audiences, while words such as "socialism" and
"illegal immigrant" are often used to stir up irrational anger. People
who think for themselves question the use of such words and phrases as
ready-made codes about how and what to think. For example, one
might argue that patriotism is, of course, a good thing, but that real patriots
have an obligation to question authority and to reject the notion of "My
country, right or wrong!" as dangerous, totalitarian rubbish.
- The
Red Herring: This strangely-titled
fallacy, named after a strong-smelling fish (the scent of which throws hounds
off the scent of a trail), occurs when one draws attention away from the main
issue in a given case by focusing on a side issue or on something
irrelevant. Accused of deceptive accounting practices, a major accounting
firm replied that their practices are the norm in all accounting firms.
This claim may or may not be true, but it is a red herring because it attempts
to draw fire away from the accounting firm and toward the larger profession of accountants.
A red herring is a changing of the subject by skilled distraction.
- Non-sequitur: Latin for "it does not follow," a non
sequitur is an inference that doesn't follow from the premises. In a
sense, every fallacy is a non sequitur, an attempt to pass off two or more
ideas as related though they are in fact not related (e.g., "If we can
send a man to the moon, why can't we find a cure for the common cold?").
- The
appeal to traditional wisdom justifies something by stating, "We've
always done it that way."
- A strawman fallacy occurs when one changes an opponent's argument, often
by focusing on a weakened version of the argument (e.g., "My opponent
wants to free serial killers and kidnappers, but I believe in laws that favor
the rights of victims"). A straw man is, of course, easier to
dissemble than a real man.
- The
bandwagon appeal suggests that a great movement is underway and makes
the reader feel guilty or foolish if he or she has not become a part of it
(e.g., "Over 60% of the city's residents believes he is a doing a
satisfactory job as police chief, so your unfavorable opinion of him is
discredited.")
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